EP2660828A1 - Appareil comprenant un fusible thermique et une résistance - Google Patents

Appareil comprenant un fusible thermique et une résistance Download PDF

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Publication number
EP2660828A1
EP2660828A1 EP11853301.7A EP11853301A EP2660828A1 EP 2660828 A1 EP2660828 A1 EP 2660828A1 EP 11853301 A EP11853301 A EP 11853301A EP 2660828 A1 EP2660828 A1 EP 2660828A1
Authority
EP
European Patent Office
Prior art keywords
resistor
thermal fuse
wirewound
device combining
lead wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11853301.7A
Other languages
German (de)
English (en)
Other versions
EP2660828B1 (fr
EP2660828A4 (fr
Inventor
Zhonghou Xu
Yousheng Xu
Xuanhui ZHU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Set Electronics Co Ltd
Original Assignee
Xiamen Set Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Xiamen Set Electronics Co Ltd filed Critical Xiamen Set Electronics Co Ltd
Publication of EP2660828A1 publication Critical patent/EP2660828A1/fr
Publication of EP2660828A4 publication Critical patent/EP2660828A4/fr
Application granted granted Critical
Publication of EP2660828B1 publication Critical patent/EP2660828B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/0039—Means for influencing the rupture process of the fusible element
    • H01H85/0047—Heating means
    • H01H85/0052—Fusible element and series heating means or series heat dams
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/08—Cooling, heating or ventilating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C13/00—Resistors not provided for elsewhere
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
    • H01C3/14—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding
    • H01C3/20—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding wound on cylindrical or prismatic base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0205—Switches using a fusible material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/165—Casings

Definitions

  • the present invention relates to a resistor against over-current and over-heat, the device is a quick response structure with a resistor and a thermal fuse integration, the size is similar to a same power wirewound resistor, carbon-film resistor or a metal-film resistor, it's applied to over-heat resistor of the power supply of the household electric appliance, IT communication equipment or lighting equipment, it can be also be served as a heating element with over-heat protection.
  • the present invention further relates to a thermal fuse with heating function, it can be applied in blockage protection of the motor of the power tool or electrical fan; when the motor is blocked, with the current, the increasing rate of the temperature of the thermal fuse to cut off is much larger than that of the temperature of the coil of the motor, assuring that the motor will not be over-heat and blocked before the cut-off of the thermal fuse, it can be used to against over-heat of the motor.
  • a high-frequency circuit is usually applied to design and construct a charger.
  • the safety performance of the charger is important.
  • a current-limiting resistor against over-current and over-heat is the key component to the safety of the high-frequency circuit.
  • the present invention is provided to meet the demanding with the safety performance of reliability and quick response.
  • the wirewound resistor also has over-current melt function
  • the resistor wire is applied with high melting point alloy and the alloy wire of the wirewound resistor will be melt to realize fuse function only if over 20 times of rated current flows.
  • the current of the wirewound resistor is often unable to reach to the melt current, the melt performance of the wirewound resistor can not be present, the temperature of the wirewound resistor reaches to 300 ⁇ 500°C, being a seriously danger to the charger.
  • thermal fuse So that people applies with a thermal fuse external contacted in series and placed inside a ceramic box, when the thermal fuse senses that the temperature of the wirewound resistor reaches to the rating temperature of the thermal fuse, the thermal fuse is melt to cut off the circuit. However, it occupies two areas in the PCB and it needs 4 bonding pads.
  • the micro-heating elements such as fragrance device or liquid electric mat
  • a thermal fuse against over-heat Existing assembly method is to connect a resistor and a thermal fuse in series then assemble above both inside a ceramic box, the box is filled with solidifiable insulation material. But the size of the product is too large, heat may lose too much, making energy waste.
  • the current of the blocked motor of power tool or electrical fan is six times of normal working current, the motor is heating fast, so it needs a thermal fuse to cut off the current to prevent over-heat and fire, but not to decrease the operation temperature of the thermal fuse to increase the agility.
  • mild overload or voltage pulsation happens when the motor works, but the thermal fuse is unexpected to cut off. So trouble happens when setting the temperature of the thermal fuse.
  • the present invention is provided with a resistor applied to the input of a high-frequency charger, and it adopts an alloy wire as the resistor, which has the resistor function and the melt protection function in high current.
  • a thermal fuse is disposed inside the base of the wirewound resistor; the thermal fuse is connected to the resistor in series in the circuit. When the wirewound resistor heats to the rated temperature, the thermal fuse is melt to assure over-heat protection function.
  • the present invention relates to a wirewound resistor with a thermal fuse built-in, in which the solid ceramic base of the wirewound resistor is changed to be hollow, a thermal fuse is disposed inside the ceramic base, the ceramic tube is severed as the housing of the thermal fuse, when one lead wire of the thermal fuse is passing through the end cap of one end of the wirewound resistor, the thermal fuse and the wirewound resistor are connected in serious tightly, and the other lead wire of the thermal fuse is extended out of the end cap of the other end of the wirewound resistor, the end cap of the wirewound resistor with an opening is extended out with a lead wire, then the whole product is encapsulated by epoxy resin.
  • the present invention of a wirewound resistor with a built-in thermal fuse can be severed as a basic unit to be assembled directly to the existing high-frequency charger, the wirewound resistor with a built-in thermal fuse can take the place of the existing simple wirewound resistor or the wirewound resistor with a thermal fuse external contacted, realizing triple functions of normal resistor function, melt protection function in high current, over-heat protection when overloaded.
  • the resistor value of the wirewound resistor with above structure is set in 0.5 ⁇
  • the temperature of the coupling thermal fuse is 150°C used in a motor of a power tool
  • this structure can be used as a micro-heater, fix it into a ceramic tube to sever as a heater of a fragrance device or liquid electric mat, the heater can be placed in the diffusion staff of perfume or other liquid, so that the thermal power of the heater can be absorbed by the perfume or other liquid.
  • Existing technology is applied with a ceramic structure, one side of which is disposed with a hole to fix the diffusion staff while the other side is disposed with a cavity, the cavity is assembled with a heating resistor and a thermal fuse and encapsulated by solidifiable insulation material.
  • the power of the existing technology of the heater is about 2.2W
  • the power of the heater of the present invention is about 1W, so that the heating temperature of the resistor is decreased, the stability of the resistor value of the resistor is improved greatly and the diffusion rate of the perfume is more stable, the influence from the environmental temperature is decreased. If the power of a fragrance device decreases 1W, 9kW power can be saved every year. If there are 50 millions heaters of fragrance device or liquid electric mat working in the world, 45000kW power can be saved, carbon emission decreased greatly.
  • Fig.1 illustrates the circuit diagram of the first embodiment
  • Fig.2A illustrates the structure of the thermal fuse of the first embodiment
  • Fig.2B illustrates the structure of the thermal fuse of the second embodiment
  • Fig.3A illustrates the structure of the wirewound resistor of the first embodiment
  • Fig.3B illustrates the structure of the wirewound resistor of the second embodiment
  • Fig.4A illustrates the structure of the structure of the application product of the first embodiment
  • Fig.4B illustrates the structure of the structure of the first embodiment without the lead wire in the common port of the wirewound resistor and the thermal fuse;
  • Fig. 5 illustrates the structure of third embodiment applied in a fragrance device
  • Fig.6 illustrates the structure of fourth embodiment of a resistor with an organism temperature sensing built-in thermal fuse
  • Fig.7 illustrates the principle diagram of the fourth embodiment of a resistor with an organism temperature sensing built-in thermal fuse.
  • the first embodiment will be further described with the fig.1, fig.2A and fig.3A . thereinto, the object of the embodiment is to describe the preferred embodiment of the present invention, but not limited.
  • Fig.1 is the circuit of a switched power supply charger of a mobilephone or an MP3, and the circuit is applied with the device combining a thermal fuse and a resistor of the present invention; in fig.2A , the lead wires 2b, 2a of the thermal fuse is welded with low-melting point alloy wire 3.
  • a fluxing agent 4 is disposed around the alloy wire 3 to improve the alloy wire to contract to two sides and cut off when molten, the thermal fuse, fluxing agent 4 and the alloy wire 3 form a whole under the normal temperature to be placed inside the ceramic tube, then two ends of the ceramic tube are encapsulated by epoxy resin 6 to be made into an entire thermal fuse.
  • the hole in the centre of the metal cap 5a is large enough for the lead wire 2a of the thermal fuse to pass through, a clearance is formed between the hole and the lead wire 2a, the creepage distance of the lead wire 2a and the metal cap 5a increases to a safe distance after the clearance is encapsulated by epoxy resin 6.
  • Fig.4 and fig.5 are the actual assemblies of the present invention.
  • fig.4B is circuit structure that the thermal fuse and the wirewound resistor are connected in series with one end input and the other end output.
  • Fig.1 is the circuit of the present invention applied in a high-frequency charger, in which the wirewound resistor is in over-heat protection mode.
  • the thermal fuse and the wirewound resistor are connected in parallel in a circuit, the wirewound resistor is wound to the ceramic housing of the thermal fuse.
  • the lead wires of the metal caps (5a, 5c) in two ends of the wirewound resistor are not connected to the lead wires of the thermal fuse.
  • the table below is the protection result data of the wirewound resistor with a thermal fuse in the first embodiment.
  • a high-frequency power supply it often applies a 10 ⁇ /2W wirewound resistor and a 221°C thermal fuse against over-heat, the comparison of cut-off speed of the external contact type and the built-in type (the first embodiment) is as below. If single wirewound resistor is not added, high surface temperature for a long time is a hidden danger in the current in the table.
  • the structure of the fourth embodiment is the same as that of the first embodiment, with different resistor value and temperature from the first embodiment, the heating of the wirewound resistor accelerates the cut-off of the thermal fuse, it is mainly applied in the motor against over-heat.
  • the resistor value of the wirewound resistor with above structure is set in 0.5 ⁇
  • the temperature of the coupling thermal fuse is 150°C used in a motor of a power tool
  • the structure of the fifth embodiment is the same as that of the first embodiment, as figured in fig.4B , replace the wirewound resistor to a carbon-film resistor or a metal-film resistor 22, the resistor value is increased to thousands of ohms, this structure can be used as a micro-heater 21 (as figured in fig.5 ); the micro-heater 21 of built-in thermal fuse is made into a fragrance device, which comprising a micro-heater 21, a housing 23, a diffusion staff 24, a sealing ring 25, a perfume bottle 26. put the housing 23 with a built-in micro-heater 21 into the diffusion staff 24, the diffusion staff 24 is passed through the sealing ring 25 and inserted into the perfume bottle 26, forming a fragrance device.
  • the power consumption of this embodiment is a saving of 50% power to existing technology.
  • an organism temperature sensing thermal fuse 30 is disposed inside the ceramic tube 1 (the principle structure is figured in fig.7 ), two ends of the ceramic tube 1 are locked with the metal caps 5a, 5b, forming a tight integration.
  • the centre of the metal cap 5b is extended out with a liplike edge, which is connected to the lead wire 2b of the thermal fuse 30; when the metal cap 5b is welded with the alloy wire of the wirewound resistor, the thermal fuse and the wirewound resistor are connected in series.
  • the hole in the centre of the metal cap 5a is large enough for the lead wire 2a of the thermal fuse 30 to pass through, a clearance is formed between the hole and the lead wire 2a, the creepage distance of the lead wire 2a and the metal cap 5a increases to a safe distance after the clearance is encapsulated by epoxy resin 6.
  • a clearance is formed between the hole and the lead wire 2b, the creepage distance of the lead wire 2b and the metal cap 5b increases to a safe distance after the clearance is encapsulated by epoxy resin 6.
  • the resistor and the thermal fuse have no electrical connections but quick thermal transferring.
  • the present invention can be served as a basic unit, which is directly assembled to an existing high-frequency charger, it can take place of the existing simple wirewound resistor or the wirewound resistor with a thermal fuse external contacted, realizing triple functions of normal resistor function, melt protection function in high current, over-heat protection when overloaded.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)
  • Details Of Resistors (AREA)
EP11853301.7A 2010-12-31 2011-12-28 Appareil comprenant un fusible thermique et une résistance Not-in-force EP2660828B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2010206974387U CN202632917U (zh) 2010-12-31 2010-12-31 一种温度保险丝与电阻结合的装置
PCT/CN2011/084826 WO2012089124A1 (fr) 2010-12-31 2011-12-28 Appareil comprenant un fusible thermique et une résistance

Publications (3)

Publication Number Publication Date
EP2660828A1 true EP2660828A1 (fr) 2013-11-06
EP2660828A4 EP2660828A4 (fr) 2017-01-18
EP2660828B1 EP2660828B1 (fr) 2017-12-20

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ID=46382317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11853301.7A Not-in-force EP2660828B1 (fr) 2010-12-31 2011-12-28 Appareil comprenant un fusible thermique et une résistance

Country Status (6)

Country Link
US (1) US9240300B2 (fr)
EP (1) EP2660828B1 (fr)
JP (1) JP2014501435A (fr)
KR (1) KR20140040081A (fr)
CN (1) CN202632917U (fr)
WO (1) WO2012089124A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3096332A4 (fr) * 2014-01-17 2017-09-13 First Resistor Condenser Co., Ltd. Résistance bobinée à l'épreuve des pointes de tension et son procédé de fabrication
KR20220122768A (ko) * 2020-01-15 2022-09-02 비와이디 컴퍼니 리미티드 다기능 퓨즈
EP4339985A1 (fr) * 2022-09-16 2024-03-20 Therm-O-Disc, Incorporated Dispositif de coupure thermique pour applications de forte puissance

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CN202632917U (zh) * 2010-12-31 2012-12-26 厦门赛尔特电子有限公司 一种温度保险丝与电阻结合的装置
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CN108039255A (zh) * 2017-12-22 2018-05-15 南京萨特科技发展有限公司 一种保险丝电阻器及其制作方法
US10347402B1 (en) * 2018-05-23 2019-07-09 Xiamen Set Electronics Co., Ltd. Thermal fuse resistor
CN109859915A (zh) * 2019-04-02 2019-06-07 安徽省昌盛电子有限公司 高抗雷击低电流熔断防爆线绕电阻器
CN111816396A (zh) * 2020-06-12 2020-10-23 安徽昭田电子科技有限公司 一种低温度系数金属膜电阻器及其制造工艺
CN112133508B (zh) * 2020-09-25 2024-07-05 世盟电子(惠州)有限公司 一种可修复式温度熔断电阻及其制造方法
FR3120155A1 (fr) * 2021-02-25 2022-08-26 Mersen France Sb Sas Appareil électrique, système électrique de coupure comportant un tel appareil
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3096332A4 (fr) * 2014-01-17 2017-09-13 First Resistor Condenser Co., Ltd. Résistance bobinée à l'épreuve des pointes de tension et son procédé de fabrication
KR20220122768A (ko) * 2020-01-15 2022-09-02 비와이디 컴퍼니 리미티드 다기능 퓨즈
EP4089711A4 (fr) * 2020-01-15 2023-07-19 BYD Company Limited Fusible multifonctionnel
US11798768B2 (en) 2020-01-15 2023-10-24 Byd Company Limited Fusing device
EP4339985A1 (fr) * 2022-09-16 2024-03-20 Therm-O-Disc, Incorporated Dispositif de coupure thermique pour applications de forte puissance
US12368013B2 (en) 2022-09-16 2025-07-22 Therm-O-Disc, Incorporated Thermal cut-off device for high power applications

Also Published As

Publication number Publication date
EP2660828B1 (fr) 2017-12-20
WO2012089124A1 (fr) 2012-07-05
CN202632917U (zh) 2012-12-26
EP2660828A4 (fr) 2017-01-18
US9240300B2 (en) 2016-01-19
US20130293343A1 (en) 2013-11-07
JP2014501435A (ja) 2014-01-20
KR20140040081A (ko) 2014-04-02

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